Rivet



Fgb. 11, 1936.

. R. A. MILLER I 2,030,168

RIVET Original Filed Aug. 28, 1951 INVENTOR. Hal 7r f7. Miller.

BY I

ATiORNEYSJ Patented Feb. 11, 1936 RIVET Ralph A. Miller, Detroit, Mich,assignor to Huxon Holding Corporation, a corporation of Michi- Orlginalapplication August 28, 1931, Serial No.

559,826. Divided and this application July 22,

1935, Serial No. 32,547

13 Claims.

The invention relates generally to rivets and particularly constitutes adivision of the subject matter embodied in Miller application, SerialNo. 559,826, filed August 28, 1931.

Generally, the invention relates to a two-part type of rivet including'atubular member and a pin extending through the tubular member. This pinhas means on one end for applying axial forces to one end of the tubularmember and when the opposite end of the tubular member is held and thesame end of the pin is pulled, the axial Iorces directed against thefirst mentioned end of the tubular member causes an adjacent portion ofthe tubular body to bulb into a head. More particularly, this type ofrivet is adapted to be inserted and set from one side and a head hasbeen provided on the end of the pin for applying the axial forcesmentioned. Since the rivet is adapted to be inserted and set from oneside, necessarily the head on the pin, as well as the adjacent end ofthe tubular member, must be of such dimensions that both parts will passthrough the opening in the structure to be riveted.

One object of the present invention is to provide a rivet of thischaracter wherein the head on the pin is of such dimensions that it maypass through the opening in the structure to be riveted and whereinspreader means are employed for increasing the effective size of thehead during the rivet setting operation.

Another object of the invention is to provide a rivet of the abovedesignated character having spreader means for increasing the effectiveabutment between the end of the pin and the-adjacent end of the tubularmember and wherein the spreader means expands during the application ofthe forces against the end of the tubular member.

Other objects of the invention will become apparent from the followingspecification, the drawing relating thereto, and from the claimshereinafter setforth. i

Fora better understanding of the invention, reference may be had to thedrawing, wherein:

Figure 1 is a press sectional view of a rivet constructed according toone form of the invention;

Fig. 2 is a cross sectional view of the rivet after it has been set inopenings in a structure.

In the construction illustrated, the tubular member is indicated at itand comprises a cylindrical body I i having a rivet head ii at one end.Both of these parts of the tubular member are provided with alongitudinally extending opening of substantially uniform-diameter whichreceives a pin E3, the diameter of which is substantially equal to thatof the opening, The pin projects .beyond the head l2 to provide an endportion for gripping and pulling purposes and t e opposite end of thepin has a head I4 for app ying axial forces against the adjacent end ofthe body I l. Adjacent the head M the pin has an annular groove [5 andan annular undercut flange l6 extending over this groove and outerportion of this flange engages a beveled edge I1 on the adjacent end ofthe body H. It will be noted that an annular recess I8 is provided bythe flange [6, the end oi the body ll inwardly of the bevel H and thegroove l5.

Initially, the head I and flange l6, as well as the body II, are of suchdimensions that the assembly may be inserted from one side of astructure to be riveted until the head I! engages the insertion orworking side of the structure.

Referring to'Fig. 2 the structure to be riveted is illustrated ascomprising plates 20 and 2| having coinciding openings for receiving therivet in its unset condition. After insertion of the rivet, the pin. I3is pulled and the reactionary force is applied against the head i2. Whenthe pin is so pulled and the reactionary force is applied against thehead l2, the beveled portion I! of the tubular body It will move alongthe inclined surface of the undercut portion l6 and into the recess l9and groove Hi. This locks the pin to the end of the body H andfacilitates bulbing of that portion of the body projecting outwardlyfrom the plate 2|. During this bulbing operation, the undercut portionI6 is deflected outwardly as shown in Fig. 2 and this prevents the headfrom shearing and passing through the tu-- bular body. It is alsoapparent that this outward deflection of the flange IS on the head l4increases the eiiective size of the head and the size of the abutmentagainst the end of the tubular member. In other words, during theapplication of the axial forces, the flangel6 expands or spreadsoutwardly to provide a more effective and larger operative engagementbetween the head on the pin and the end portion of the tubular member,

It may be mentioned that the tubular member is constructed of metalrelatively ductile as combe apparent to those skilled in the art thatvarious modifications may be made, without departing from the scope ofthe appended claims.

What is claimed is:

l.- A rivet comprising a tubular member, a pin extending through thetubular member and. hav ing a head at one end for applying axial forcesto the adjacent end to the tubular member when the pin is moved relativeto the latter and spreader means for enlarging the effective diameter ofthe head during application of axial forces against the end of thetubular member through the head.

2. A rivet comprising a tubular member, a pin extending through thetubular member and having a head at one end for applying axial forces tothe adjacent end of the tubular member when the pin is moved relative tothe latter and spreader means adapted to expand outwardly so as toincrease the effective diameter of the head during application of axialforces against the end of the tubular member through the head.

3. A rivet comprising a tubular member, a pin extending through thetubular member, and means on one-end of the pin for applying axialforces to the adjacent end of the tubular member, and including meansexpansible by and during the application of such forces.

4. A rivet comprising a tubular member, a pinextending through thetubular member, abutment means on one end of the pin for engaging andapplying axial forces to the adjacent end of the tubular member, andmeans rendering said abutment means expansib'le during the applicationof axial forces to the end of the tubular member so as to, in effect,increase the size of the abutment means.

5. A rivet comprising a tubular body, a shank in the body and having ahead engaging one end of the body, the head having undercut portionsadapted to flare outwardly when the head is moved against the body.

6. In combination, a tubular rivet member adapted to be inserted and setfrom one side of a structure and having a body portion adapted toproject through openings in the structure, a. tubular portion having acontinuously annular wall adapted to project from that side of thestructure her at the outer end of the tubular portionwhich is adapted tobecome larger in radial dimensions to provide a greater abutment againstthe end of the tubular portion when said last mentioned member is pulledfor the purpose of formingthe bulbed head.

7. A rivet comprising a tubular member adapt.-

ed to project through openings in a structure tobe riveted, and beyondone side of the structure, a pin extending through the tubular memberand means on the pin for engaging the projecting end of the tubularmember, when the pin is moved through the tubular member, said meansbeing of such character as to become radially enlarged upon forcefulengagement with the end of the tubular member.

8. A rivet as an article of manufacture which is adapted to be insertedand set from one side of a structure to be riveted, comprising a tubularrivet member, a shank extending through such member, and a substantialflange on said shank extending axially over an outer surface portion ofone end of the member, the dimensions of such flange being such as topermit initial insertion thereof through the opening in the structure tobe riveted.

9. A rivet as an article (if-manufacture which is adapted to be insertedand set from one side of a structureto be riveted, comprising a tubularrivet member, a shank extending through such member, a substantialflange on said shank extending axially over an outer surface portion ofone end of the member, said flange being annular in character, and inconjunction with the shank part within the tubular member, defininginner and outer supporting walls for such end part of the tubularmember.

10. A rivet as an article of manufacture which is adapted to be insertedand set from one side of a structure to be riveted, comprising a tubularrivet member, a shank extending through such member, and a substantialflange on said shank extending axially over an outer surface portion ofone end of the member, said flange comprising material less ductile thanthat of the tubular member.

11. A rivet as an article of manufacture which is adapted to be insertedand set from one side of a structure to be riveted, comprising a tubularrivet member having an end portion of reduced outer diameter, a shankmember extending through such tubular member, and a head on such shankhaving. a substantial portion extending axially over an end of suchtubular por= tion of reduced outer diameter, the dimensions of suchportion of the shank being such as to permit initial insertion thereofthrough the opening in the structure to be riveted.-

12. A rivet comprising a tubularmember having a portion adapted to beexpanded into a head by axial forces, a pin extending through themember, and means on one end of the pin for applying axial forces to theend of said portion and including means expansible by and during theapplication of such forces.

13. A rivet comprising a tubular member having a continuously annularportion adapted to be bulbed into an annular head by axial forces, a pinextending through the member, abutment means on one end of the pin forengaging and applying axial forces to the end of such portion, and meansrendering the abutment means expansible' during the application of axialforces to the end of such portion so as to, in effect, increase the sizeof the abutment means.

RALPH A. MILLER.

